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Shortwave Strange Sounds



 
 
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  #1  
Old March 18th 04, 04:05 AM
S R
Guest
 
Posts: n/a
Default Shortwave Strange Sounds

I like both analog & digital shortwaves radios. With analog, I often hear
more different kinds of sounds that I would not always hear on digital
shortwave radios.

Sometimes their are evenings when I can not pick up any broadcasting
signals. So I'll just listen to the different noises in the different
bands and wonder if I could identify any of them. (As a SWL, what else could
I do? LOL!)

One type of sound, sounds like strong winds & storms. If fact this sound
may run over many frequencies through out a band. (I hear this more on
digital). I wonder if these are utility stations?

Another strange sound is like a bubbles exploiting. I hear this only on
analog.

Sometimes I hear what might sound like beacons. But I have not way to
confirm it.

I wish someone puts together a recording of all of these sounds & help
identify them.

The sound I like the most is that sequel sound that is heard on analog then
turning the dial.

Although I love digital radios for their features, but when you bring the
squelch down, the noise is too clean. It is not nature enough for me. LOL!

Hey, what is AFC, X-TAL & Superheterodne???

And did the strange sounds of tube radio were different from transistor
radios?

73


  #2  
Old March 18th 04, 04:21 AM
Tony Meloche
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Posts: n/a
Default



S R wrote:

(snip)

Another strange sound is like a bubbles exploiting. I hear this only on
analog.



This is part and pracel of listening to Radio Marti, which broadcasts
from this country to Cuba. The bubbling sound is Cuban jamming. Not
very effective here, but we're close to the signal and far from the
jamming. Wonder how it sounds there?





Hey, what is AFC, X-TAL & Superheterodne???


AFC is Automatic Frequency Control. It "locks" the station freqency
to prevent drift, in theory. Sometimes it's a great help. Sometimes,
it's a hindrance. Most effective in FM radio.

I honestly don't know what X-Tal is.

Superheterodyne means "above heterodyne". Heterodyning involves
using two carrier waves at different frequencies. The sound created
between the two is a whistle or sine wave tone that rises or drops in
frequeny as you approach the "center" of the station's signal. Have you
seen old movies or cartons where someone is tuning a radio statin in,
and those swooping "weeeeeohhhhwaaahh"
tones until they get to the station? Those are heterodynes.
Superheterodybe circuitry eliminates it by using carrier waves above
audible frequencies, but they are still clearly heard in any SSB mode,
and are a great aid to tuning precisely.

Tony


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  #3  
Old March 18th 04, 04:39 AM
Maximus
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Posts: n/a
Default

http://www.wunclub.com/sounds/
This is a list such as may profit you in your endeavor s.

"Strength and Honor"


"Tony Meloche" wrote in message
...


S R wrote:

(snip)

Another strange sound is like a bubbles exploiting. I hear this only on
analog.



This is part and pracel of listening to Radio Marti, which broadcasts
from this country to Cuba. The bubbling sound is Cuban jamming. Not
very effective here, but we're close to the signal and far from the
jamming. Wonder how it sounds there?





Hey, what is AFC, X-TAL & Superheterodne???


AFC is Automatic Frequency Control. It "locks" the station freqency
to prevent drift, in theory. Sometimes it's a great help. Sometimes,
it's a hindrance. Most effective in FM radio.

I honestly don't know what X-Tal is.

Superheterodyne means "above heterodyne". Heterodyning involves
using two carrier waves at different frequencies. The sound created
between the two is a whistle or sine wave tone that rises or drops in
frequeny as you approach the "center" of the station's signal. Have you
seen old movies or cartons where someone is tuning a radio statin in,
and those swooping "weeeeeohhhhwaaahh"
tones until they get to the station? Those are heterodynes.
Superheterodybe circuitry eliminates it by using carrier waves above
audible frequencies, but they are still clearly heard in any SSB mode,
and are a great aid to tuning precisely.

Tony


----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet

News==----
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Newsgroups
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  #4  
Old March 18th 04, 04:39 AM
S R
Guest
 
Posts: n/a
Default

Hi Tony: The bubbling sound I hear, only happens on the 10 & 11 meter band.
(Analog). It is at random.

Someone once refer to this bubbling as a whale fart.

Now, I am not sure if we are talking about the same sound? Marti or Havana,
Cuba is usually on 49 meters. 6.000 mhz (I think).

Please tell me which FREQ. & UTC you hear that jamming. And jamming at
which station? Thank you.

Last night (Tue) at 0200 UTC I was listening to 7415 Hour of the time. The
station came in very clear and after maybe 15 minutes, a lot of interference
came in. I wonder?

73


"Tony Meloche" wrote in message
...


S R wrote:

(snip)

Another strange sound is like a bubbles exploiting. I hear this only on
analog.



This is part and pracel of listening to Radio Marti, which broadcasts
from this country to Cuba. The bubbling sound is Cuban jamming. Not
very effective here, but we're close to the signal and far from the
jamming. Wonder how it sounds there?





Hey, what is AFC, X-TAL & Superheterodne???


AFC is Automatic Frequency Control. It "locks" the station freqency
to prevent drift, in theory. Sometimes it's a great help. Sometimes,
it's a hindrance. Most effective in FM radio.

I honestly don't know what X-Tal is.

Superheterodyne means "above heterodyne". Heterodyning involves
using two carrier waves at different frequencies. The sound created
between the two is a whistle or sine wave tone that rises or drops in
frequeny as you approach the "center" of the station's signal. Have you
seen old movies or cartons where someone is tuning a radio statin in,
and those swooping "weeeeeohhhhwaaahh"
tones until they get to the station? Those are heterodynes.
Superheterodybe circuitry eliminates it by using carrier waves above
audible frequencies, but they are still clearly heard in any SSB mode,
and are a great aid to tuning precisely.

Tony


----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet

News==----
http://www.newsfeed.com The #1 Newsgroup Service in the World! 100,000

Newsgroups
---= 19 East/West-Coast Specialized Servers - Total Privacy via Encryption

=---


  #5  
Old March 18th 04, 04:53 AM
Tony Meloche
Guest
 
Posts: n/a
Default



S R wrote:

Hi Tony: The bubbling sound I hear, only happens on the 10 & 11 meter band.
(Analog). It is at random.

Someone once refer to this bubbling as a whale fart.

Now, I am not sure if we are talking about the same sound? Marti or Havana,
Cuba is usually on 49 meters. 6.000 mhz (I think).

Please tell me which FREQ. & UTC you hear that jamming. And jamming at
which station? Thank you.




The sound I am describing sounds like a pot of water come to a boil,
or a fish aquarium with a pump. I won't even begin (this late) to try
and give you the frequencies I hear Radio Marti. Suffice to say it's
from one end of the dial to the other, and easily hearable all over the
USA anytime of day or night. If you run the 41, 31 and 25 meter bands
at night, or the 25, 21 and 19 meter bands during the day, you will
inevitably hear R. Marti. Usually in many places. The broadcasts are
from Washington, but the transmitter is in Greenville, S.C Cuba
has nothing to do with Radio Marti except to try and block it's signal
from being readable anywhere in Cuba. That's the "bubbling".

Tony


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  #6  
Old March 18th 04, 06:38 AM
Pete KE9OA
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Posts: n/a
Default

Xtal stands for crystal. As Tony said, a superheterodyne receiver is one
where the input signal is combined in a mixer with a local oscillator
signal. The local oscillator signal is separated from the input signal by a
difference in frequency that is referred to as the intermediate frequency
(I.F.) Either high or low side injection can be used, although most of the
time, high side injection yields better response in terms of in-band spurs.
This refers to whether the local oscillator (LO) runs either above or below
the received frequency.
The reason that this scheme is used is because high gain can be achieved
without the need to have several stages tracking at the received signal
frequency. This is a good deal, since most of the amplification is done at
the I.F. Typical intermediate frequencies are 455kHz, 10.7MHz, 45MHz, etc.

Pete

"S R" wrote in message
...
Hi Tony: The bubbling sound I hear, only happens on the 10 & 11 meter

band.
(Analog). It is at random.

Someone once refer to this bubbling as a whale fart.

Now, I am not sure if we are talking about the same sound? Marti or

Havana,
Cuba is usually on 49 meters. 6.000 mhz (I think).

Please tell me which FREQ. & UTC you hear that jamming. And jamming at
which station? Thank you.

Last night (Tue) at 0200 UTC I was listening to 7415 Hour of the time.

The
station came in very clear and after maybe 15 minutes, a lot of

interference
came in. I wonder?

73


"Tony Meloche" wrote in message
...


S R wrote:

(snip)

Another strange sound is like a bubbles exploiting. I hear this only

on
analog.



This is part and pracel of listening to Radio Marti, which broadcasts
from this country to Cuba. The bubbling sound is Cuban jamming. Not
very effective here, but we're close to the signal and far from the
jamming. Wonder how it sounds there?





Hey, what is AFC, X-TAL & Superheterodne???


AFC is Automatic Frequency Control. It "locks" the station freqency
to prevent drift, in theory. Sometimes it's a great help. Sometimes,
it's a hindrance. Most effective in FM radio.

I honestly don't know what X-Tal is.

Superheterodyne means "above heterodyne". Heterodyning involves
using two carrier waves at different frequencies. The sound created
between the two is a whistle or sine wave tone that rises or drops in
frequeny as you approach the "center" of the station's signal. Have you
seen old movies or cartons where someone is tuning a radio statin in,
and those swooping "weeeeeohhhhwaaahh"
tones until they get to the station? Those are heterodynes.
Superheterodybe circuitry eliminates it by using carrier waves above
audible frequencies, but they are still clearly heard in any SSB mode,
and are a great aid to tuning precisely.

Tony


----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet

News==----
http://www.newsfeed.com The #1 Newsgroup Service in the World! 100,000

Newsgroups
---= 19 East/West-Coast Specialized Servers - Total Privacy via

Encryption
=---




  #7  
Old March 18th 04, 08:49 AM
Tom Sevart
Guest
 
Posts: n/a
Default


"S R" wrote in message
...


I wish someone puts together a recording of all of these sounds & help
identify them.


Try he

http://www.wunclub.com/sounds/index.html


--
Tom Sevart N2UHC
Frontenac, KS
http://www.geocities.com/n2uhc


  #8  
Old March 18th 04, 08:53 AM
Tom Sevart
Guest
 
Posts: n/a
Default


"S R" wrote in message
...
Hi Tony: The bubbling sound I hear, only happens on the 10 & 11 meter

band.
(Analog). It is at random.

Someone once refer to this bubbling as a whale fart.


I think you're hearing Over-The-Horizon Radar (OTHR). It is a very
flatulent signal that I once heard a guy on a fishing boat refer to as
"gorilla farts."

http://www.wunclub.com/sounds/index.html

Click on the OTHR link and see if it's the same one.


--
Tom Sevart N2UHC
Frontenac, KS
http://www.geocities.com/n2uhc


  #9  
Old March 19th 04, 06:41 AM
Jay Heyl
Guest
 
Posts: n/a
Default

In article ,
says...
Try he

http://www.wunclub.com/sounds/index.html

That's an interesting site. Does anyone know of a site that has
examples of signals at various SIO/SINPO ratings? I usually put down
some kind of rating in my logs, but I'm never sure if my idea of "barely
audible" is the same as anyone else's. It would be nice to have some
kind of example of various ratings from more experienced folks.

-- Jay
  #10  
Old March 19th 04, 08:23 AM
starman
Guest
 
Posts: n/a
Default

Tom Sevart wrote:

"S R" wrote in message
...
Hi Tony: The bubbling sound I hear, only happens on the 10 & 11 meter

band.
(Analog). It is at random.

Someone once refer to this bubbling as a whale fart.


I think you're hearing Over-The-Horizon Radar (OTHR). It is a very
flatulent signal that I once heard a guy on a fishing boat refer to as
"gorilla farts."

http://www.wunclub.com/sounds/index.html

Click on the OTHR link and see if it's the same one.


I'm familiar with two kinds of 'bubble' signals. One is a utility mode
for sending data and the other kind is used for jamming a shortwave
signal. Both have a bubbling quality to their sound. If you hear a
bubble signal on one of the international shortwave bands, it's likely a
jammmer.


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